Just fitted the above to my s410, absulutley brilliant out 50 yds, with a 30 x 25 mount off evilb-y total cost 17 squid, mounted just in front of the bolt on its side , With the rear silent switch its available when required with just a small movement of y thumb 2 settings 1st full beam 2nd economy, don't make my mistake 2 pressures to switch off , Batteries supplied dead anyway a real bargain
ps battery life(3 aaa ) on full 3hrs, economy 15hrs
Mike